Apparatus for hoisting oil, brine, or other liquids from wells



M. LOEWENTHAL AND F. EGERSDGRFER. APPARATUS FOR momma on, ems, OR OTHER uqums mom wms.

APPLICATION FILED SEPT- 9,1914- ,1,403,699. Patented Jan. 17, 1922.

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' it is not necessary APPARATUS FOR EOISTING OIL,

To all whom it mag concern: i

Be it known that we, MORITZ LOEWENTHAL, a citizen of the German Empire, residing at Lichterfelde, near Berlin, ,German and FRITZ EeERsDiiRrER, a citizen of the erman Empire, residing at Charlottenburg, near Berlin, Germany, have invented certain new and useful Im rovements in Apparatus for Hoisting Oil, rine, or other Liquids, from Wells; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertain's to make and use the same.

Our invention relates to improvements in apparatus for hoisting oil, brine, or other liquids from wells, and the object of the improvements is to provide an apparatus.

which is effective in operation and economical even under the most unfavorable conditions. With this objectin view our invention consists in hoisting the liquid by means of a pump which is located at the bottom of the well and which is driven by means of a motor provided with one or more revolving pistons which is directly coupled to the pump and which for this reason is likewise located at the bottom of the well. The motor and pump are arranged one above the other, with their main shafts extending, preferably, in line with each and they are both valveless. Thereby we are enabled to. operate the apparatus under a pressure of several hundreds of atmospheres and to construct the same with a diameter which is so small that it can be brought from above into the well. Therefore the apparatus is driven at the bottom of the well in an economical Way, the power medium being supplied through a stationary pipe. If a liquid is used for driving the motor with a rotating piston the said liquid can be compressed to very high pressure so that it transmits much power to the bottom of the well, thou h the amount of liquid is comparatively sma 1. In this case the efliciency of the pump is such, that it can force upwards large amounts of the liquid to be hoisted apart from the pressure medium.

In a preferred embodiment of the inven tion we use as a pressure medium the same liquid which is hoisted from the well, so that thereafter to separate the pressure medium and the hoisted l1quid. In this embodiment we prefer to discharge the other vertically PATENT OFFICE.

BRINE, or. owner. mourns rnou warms.-

power which is Specification of Letters Patent. Pate t d J n. 17, 1922 Application filed September 9, 1914. 1 Serlal No. 860,844 v movement of the liquid. In both cases the motor with rotating piston is advantageous in this respect that within the pressure condu1t no shocks or blows are caused by the pressure medium, because the flow of the 11 uid is uniform.

he pump is preferably constructed in the form of a screw ump or as a pump with r0- tating piston. Q n both cases it is directly coupled w1th the motor. If the pump is constructed in the form of a pump with a rotating plston, it is preferably enclosed Wlthll'l the'same casing as the motor, so that the outer form of the apparatus is that of a plpe without any movable-parts projecting therefrom.

Apparatus of the class described have no valves, so that they can be used forv forcing liqu ds which have sand or other foreign matter admixed therewith. For this reason we are enabled to connect the apparatus with a drill, in which case the apparatus can be used for forcing the well further downwards. Therefore it is not necessary to remove the apparatus and the drill from the well and to bring the same again into the well, which is particularly expensive wherethe well is deep. Besides it is not necessary to provide special rods for the drill.

For the purpose of explaining the invention several examples embodying the same have been shown in the accompanyingdr'aw .ing, in which the same letters of reference with a drill, and

.Fig. 4, is a horizontal cross-section taken on the line A-A of Fig. 1.

Referring to the example shown in Fig. 1, the well 4 is equipped inthe usual way with pipes 5 providlng a lining therefor. At the ottom, of the well a motor 6 is located which consists of an upright main shaft or rotary drum 10 receiving within slots 28 one or more reciprocating pistons 7. As appears from Fig. 4, the casin 29 of the motor is internally eccentric oft e axis of the drum 10 carryingthepistons, so that the pistons are reciprocated within the drum during rotation of the latter. The pressure medium is supplied to the chambers provided between the casing 29, the drum 10 and the pistons 7 through a port 8 which communicates with a supply pipe 9 extending to the top of the well and a suitable supply for a pressure medium. The pressuremedifim is adapted to be discharged through a passage 21. The drum 10 is rotated by the pressure medium acting on the pistons 7, the direction of rotation remaining always the same.

In the example shown in Fig. 1 the drum 10 is equipped with a second set of istons 11 which act as pump pistons and which are constructed in thesame way as the pistons 7.

The eccentric chamber within which the pistions rotate communicates with an inlet passage 12 and an'outlet passage 13.. All the parts are enclosed within the same casing 29.. At its upper end the passage 13 merges in a tubular portion 14 of the casing, which on closes the upperend of the passage 8 and which is connected with a pipe 15 throu h which the liquid is forced upwards. The pressure pipe 15 embraces the supply pipe 9 for the pressure medium over the whole length of the latter. The pipe 9 is connected above the ground with a ressure pump 16 the suction pipe 17 of which extends into a receptacle 18. The latter communicates with the pipe 15 so that the liquid forced from the well is discharged into the receptacle 18. Therefore in the example shown in Fig. 1

from the bottom of the well is used for transmitting power to the motor 6. In order that no impurities may have access to the inner part of the pressure pump 16 and to the motor 6 driven by the pressure fluid from the said pump, sieves 19 and 20 are provided by means of which foreign matter such as sand or the like is separated from the liquid before being supplied to the pip 17. I

he liquid which is drawn in b the pressure pump 16 through the pipe I; is forced under high pressure into the pipe 9 and through the latter into the port 8 of the-motor located at the bottom of the well. Within the motor 6 it acts on the pistons 7 and is discharged into the passage 13. The piston dru'm 10 which is rotated by means of the pressure medium acting on the pistons 7 drives the pistons 11 which act as the pistons of a pum and draw in by suction the liquid to'be. hoisted, such as brine, oil or the like, through .the suction passage .12 and force the same-into the assagel3. Within the latter the liquid is mixed with the liquid from the motor and the passage 21, and thev whole mass is forced upwards through the tube 15. As the pressure medium for driving the apparatusis taken from the liquid which has already been hoisted, the liquid being hoisted is not mixed with a foreign liquid.

In the, example shown in Fig. 2, the pump is constructed in the form of a screw pump 22 located in the lower part of the pipe 15. The pipe 9 for supplying the pressure me diu m to the motor of the pump is located at the side of the pipe 15' through'which the liquid is forced upwards, and it communicates through a port 8 with the working chamber of the pistons 7. The discharge port 21 for the liquid from the motor is directed towards. the bottom of the well 4', so that the liquid being discharged forms a strong jet for stirring the bottom of the well. p The liquid to be hoisted is drawn into the' pipe 15 through holes 23 made in the lower part of the pipe and it is forced upwards by means of a screw pump 22. The pressure liquid and the liquid being hoisted are mixed with each other at the bottom of the well and outside the pum The example shown in Fig. 3 is substane tially the same as that described with reference to Fig. 2 and the same letters of reference have been used to indicate oorresponding parts. In addition to the pump 22 a drill 24 is connected to the motor 6', 7, the said drill being located at the bottom end of the motor. While the whole apparatus remains in its position, the drill freely moves over the ground of the well, so that it does not act on the ground but stirs the liquid, and in other respects the apparatus has the same function as that described with reference to Fig. 2. However, if the apparatus is lowered, the drill works on the ground of the well 4, so that the drill is forced fur- Ill ther downwards, while the pump remains in operation, so that the mass of sand. or rock made loose by thezdrill is forced upwards together with the liquid. Also in this case the jet of the liquid which is discharged from the passage 21 has the function of stirring the ground.

The operation of our improved apparatus is economical, because the cost of the whole apparatus is low, the apparatus requires III little attention by the operator, and comaratively little power. The motor is of the Enid-pressure type, 'by which is'meant that the motor is driven by. the pressure of a suitable fluid. Since the apparatus is designed to be used in wells of the greatest depth which must be constructed with a small diameter, it must be most compact and of the smallest possible diameter. This requirement is met by arranging a motor of the fluid pressure type, a pump, and a drill in line. above one another and their upright axes in line with one another and with the conduits for supplying the motive fluid to the motor and hoisting the liquid from the pump. As a motor of the fluid pressure type has a small diameter as compared to motors of other types, the apparatus can be used in wells of the smallest diameters. This arrangement is an important feature of our invention. Both the motor and the ump are valveless and their operation is, t 'erefore, unaffected by the admixture of sand with the fluid, from which it results that a drill may be driven by the motor, in which case the pump cooperates with the drill to remove the matter which has been cut from the ground. The piston of the motor is rotary and of the bladed type and moves always in the same direction, the pressure transmitted by the fluid acting upon the exposed surface of the piston-blades 7 (or '7). The hoisting operation is not affected by the composition of the liquid, which may or may not be free of sand, easily or difficulty fluent, and finally the depth and the diameter of the well are immaterial as far as usefulness of the apparatus is concerned, because the motor with rotatmg piston can 0 erateunder any hlgh pressure correspon mg to the .depth of the well.

We claim herein as our invention:

1. In an apparatus for hoisting liquids such as oil, brine and the like, the combination with a motor of the fluid pressure type adapted to be placed at the bottom of the well, and a conduit for supplying a motive fluid to said motor, of a pump operatively connected with said motor, and a conduit connected with said pump for hoisting the liquid therethrough and disposed substantially parallel to said conduit for supplymg a motive fluid to said motor, said motor and pump being disposed in line with said conduits and one behind the otherin the direction of said conduits.

2.In an apparatus for hoisting liquids such as oil, brine and the like, the combination with a piston motor of the fluid pressure type adapted to be placed at the bottom of the well, and a conduit for supplying a motive fluid to said motor, of a piston pump operatively connected with said motor, and a conduit connected with said pump for hoisting the liquid therethrough and disposed substantially parallel to said conduit for supplying a motive fluid to said motor, said motor and pump being disposed in line'with said conduits and one behind the other in the direction of said conduits.

3. In an apparatus for hoisting liquids such as oil, brine and the like, the combination with a motor of the fluid pressure type, and a conduit for supplying a motive fluid to said motor, of a pump operatively c0nnected with said motor, and a conduit connected with said pump for hoisting the liquid therethrough and disposed substantially parallel to said conduit for supplying a motive fluid to said motor, said motor and pump being disposed in line with said conduits and one behind the other in the direction of said conduits, and said motor having its fluid outlet directed substantially in line with and away from said conduits.

4. In an apparatus for hoisting liquids such as oil, brine and the like, the combina-v tion with a valveless motor of the fluid pressure type adapted to be placed at the bottom of the well, and a conduit for supplying a motive fluid to said motor, of a valveless pump operatively connected with said motor, a conduit connected with said pump for hoisting the liquid therethrough and disposed substantially parallel to said conduit for supplying a motive fluid to said motor, and a drill connected with said motor and pump and located-in position for cutting the ground at the bottom of the well, said motor, pump, and drill being disposed in line with said conduits and one behind the other in the direction of said conduits, and said motor having its fluid outlet directed substantially in line with and away from said conduits.

In testimony whereof we hereunto aflix our signatures in the presence of two witnesses.

MOR-ITZ LOEWENTHAL.

FRITZ EoERsDoRFER.

Witnesses WOLDEMAR HAUPT, HENRY HASPER. 

